RFR: 8274107: Cherry pick GTK WebKit 2.32.4 changes

[Ambarish Rapte]

Cherry pick the GTK webkit 2.32.4 changes
https://webkitgtk.org/2021/09/17/webkitgtk2.32.4-released.html

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Commit messages:
 - cherry-pick webkit-2.32.4

Changes: https://git.openjdk.java.net/jfx/pull/631/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jfx&pr=631&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8274107
  Stats: 1811 lines in 131 files changed: 1043 ins; 205 del; 563 mod
  Patch: https://git.openjdk.java.net/jfx/pull/631.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/631/head:pull/631

PR: https://git.openjdk.java.net/jfx/pull/631